What is an index contour?

On a topographic map, index contours are represented by solid dark brown lines usually labeled with their elevation values and allow the elevation of other contour lines to be easily referenced.Top...
Read More »http://www.answerbag.com/q_view/1961909

What is a contour map?

According to Dictionary.com, a contour map is a type of topographic map where the surface of the land is depicted by contour lines. These lines help readers determine and understand slope and eleva...
Read More »http://www.answerbag.com/q_view/1989852

What is the contour interval on a map?

The contour interval is the elevation distance between two contour lines on a topographic map. A contour interval of 20 meters, then, indicates that there is a difference in elevation of 20 meters ...
Read More »http://www.answerbag.com/q_view/2032110